Birefringence calculations in elliptical-core optical fibres

Abstract

It is shown that in the useful single-mode region, the birefringence properties of elliptical-core fibres match very well with those of a rectangular-core waveguide having the same core area, same aspect ratio and same core and cladding refractive indices. This gives a simple method of obtaining the birefringence and V-value for maximum birefringence in ellipticalcore fibres.